Shift Pointers Archives - Page 2 of 18 - Transmission Digest
Park Wiggle Movement (En Español)

La transmisión 6F35 utiliza un sensor interno de rango de transmisión digital (TR) (figura 1) para proporcionar un ciclo de trabajo de frecuencia fija al módulo de control de la transmisión (TCM) para cinco posiciones diferentes de la palanca de control manual. ellos siendo; Estacionar, reversa, neutral, conducir y baja. El TCM usa esta entrada

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Shift Pointers: Park Wiggle Movement

The Ford 6F35 transmission uses an internal Digital Transmission Range (TR) sensor (Figure 1, above) to provide a fixed frequency duty cycle to the Transmission Control Module (TCM) for five different manual control lever positions. They are Park, Reverse, Neutral, Drive and Low. The TCM uses this input to influence line pressure control, shift scheduling

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Shift Pointers: A Peculiar Problem Syndrome

An interesting scenario arose recently at Performance Transmissions, where Rick was faced with a 62TE pressure control problem in a 3.6L 2019 Dodge Grand Caravan. The Line Pressure Solenoid is a Normally Vented Solenoid designed to lower line pressure when it duty cycles as the hydraulics show in figure 1, above. The theory of operation provided

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When a transmission problem isn’t a transmission problem

Let’s take a look at three examples of times when a car’s issue seems to be a transmission problem, but a closer look reveals another culprit. Case study 1: Ford 5R44E A 2009 Ford Ranger 2WD 2.3L with a 5R44E transmission and 110,000 miles on the odometer comes to the shop with a concern of

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Shift Pointers: No ball, no reverse

Yoram Levy from Israel gave us a call with a 2022 Chevrolet Traverse using a 9T65 that suddenly lost reverse. He had found a check ball missing in his valve body which he points out in figure 1 (above). Figure 2, below, shows how bad the plate was where this ball passed through. GM usually

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Shift pointers: A 4T65-E that wants to move in Park and Neutral

When conducting ATSG seminars, as we are usually covering a specific piece of tech, we’ll often tell attendees that if they put this together wrong, they should let us know what happens. Just recently, Ricky Hodgkinson from AACTION Transmission did just that. He was kind enough to share an incident he recently had with a

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Shift Pointers: Reassembling GM pumps with cam failure

For the past several years, GM has used a binary positive displacement vane type pump. The compact design allows for it to be utilized in off-axis applications such as the 8L90 transmission and the third generation 6T40 transmission. Figures 1 (above) through 4 display a view of this style pump in the 6T40 applications. The

Transmission slipping in fifth gear: An elusive cause of a common problem

Sometimes, finding the cause of a complaint isn’t as straightforward as one would expect; sometimes, these causes can be very elusive.

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From one problem to the next: When a simple solution becomes complicated

A 2007 Chevrolet Express 3500 comes to our shop with a concern of no reverse and very little forward movement. A quick check of codes reveals the following: P0171 Fuel Trim System Lean B1 Po174 Fuel Trim System Lean B2 P0218 Transmission Fluid Overtemp P0300 Engine Misfire Detected P0455 Evap Leak P0753 1-2 Shift Solenoid

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6F35: A classic bolt intrusion

I remember the first time I took a phone call from a shop that had a GM 4L60-E with a complaint that it felt like it was bound up in both reverse and drive. I you got into the throttle a bit, it would move but with a terrible noise. After the Park Pawl was

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Japanese CVT no-move conditions: Failsafe or defective TCM?

The Japanese Automatic Transmission Company produces a continuously variable transmission (CVT) known as the JF016/17E, which has been fitted behind 2.0L to 3.5L engines worldwide. Here in the United States, there is a light version called the CVT-8LT for 4 cylinder applications (JF016E) and a heavier version called the CVT-8HT for V-6 applications (JF017E). Nissan

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GM 10L80: A new kind of pump noise

How quickly time passes by. The GM 10L80/90 transmissions began production in 2017, meaning that we’re closing in on six years of this transmission being on the road. Many who work in the dealerships have become privy to the immediate failures that occur in this unit. And now, with some of these transmissions coming out

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